Sheathing driver



Feb. 21, 1933.

J. c. CURTIS.

SHEATHING DRIVER Filed .Aug. 28, 1931 JOHN L'- CURTIS dbl omwq 5Patented Feb. 21, 1933 UNITED STATES PATENT oFFie JOHN C. CURTIS, FCLEVELAND, OHIO, ASSIGNOR TO THE CLEVELAND ROCK DRILL COMPANY, OFCLEVELAND, OHIO, A CORPORATION OF OHIO SHELATHING DRIVER Applicationfiled August 28, 1931} Serial No. 559,875.

This invention relates to improvements in sheathing drivers and morespecifically to ap-- paratus for use with fluid actuated tools of thepercussive type, such for example as rock drills.

In adapting portable tools for driving sheathing, piles or similarmaterial, it is customary to employ an anvil block-which is soproportioned as to engage the major area of the end of the sheathingstock. The anvil and adaptor frame therefore are usually borne by thetool and are so constructed as to accommodate its addition to theforward end of the cylinder of the tool, and are like wise so formed asto support a guide member or sheathing saddle adapted for engagementupon the work.

One of the pre-requisites in the design of sheathing saddles of thistype is that some provision must be made to accommodate the device tothe variable thickness of stock usually encountered. Cheek plates orshims interposed between the side walls of the saddle and the pile haveheretofore been commercially employed but it has been found that theselection of the most suitable plate and the adjustment thereof entailsconsiderable labor, particularly when it is found necessary to make suchadjustments in field work. Forthermore, the sheathing saddles which havebeen formed to accommodate cheek plates have been so constructed as toinhibit the structural adaptability. of wrought iron or steel bar-stockforgings, and other similar light stock which is capable of sustainingthe vibratory strains imposed upon the sheathing saddle. v

One of the objects of this invention, there I .fore, is to construct asheathing saddle or 40 guide member of light bar stock which is suitablein strength and structurally susceptible of withstanding the vibratorystrains and bending forces to which it is subjected.

Another object of this invention is to construct an anvil adaptor frameand sheathing saddle which may be readily adjusted to accommodatedifferent thickness of sheathing stock without the necessity ofemploying removable cheek plates or spacer blocks.

'Another object ofthis invention is to proinvention.

vide asheathing guide comprising separable elements which may beadjusted, removed or renewed in part. I

Another object of this invention is to construct a sheathing saddlewhich is relatively light in weight, accessible of adjustability,durable of construction and economic of manufacture.

Other objects more or less ancillary to the foregoing and the manner inwhich all of the various objects are realized will appear in thefollowing description, which considered in connection with theaccompanying drawing, sets forth the preferred embodiment of the In thedrawing,

Fig. 1 is a central vertical section of the anvil block, adaptor frameand sheathing saddle illustrating the preferred embodiment of thisinvention.

Fig. 2. is a vertical sectional View of the anvil block and itsappurtenances taken on a plane, substantially 90 to the illustration ofFig. 1 and indicated by line 2-2 in Fig. 1.

Fig. 3 is a detail elevational view of the sheathing saddle and afragmentary portion of the anvil block illustrating the contour and therelation of the respective parts of the device.

Figure 4 is an underneath plan View of the sheathing driver.

The device comprises in its general organization an anvil block adaptorframe 10 which is suitably secured upon the forward portion of thecylinder (not shown) by means of side bolts 11. The adaptor frame isbored to receive an anvil block 12 which is provided with a stem 15adapted to be struck intermittently by the hammer (not shown) of therock drill. The lower face of the anvil is provided with a plurality ofpins or spikes 13 arranged for engagement with the sheathing material orpile 14. The adaptor frame 10 is formed with laterally extended flanges16 apertured with intersecting bolt holes 17 and 17". The guide memberor sheathing saddle comprises a pair of formed stanchions 18 and 28respectively which may be supported by the adaptor frame in either thebolt holes 17 or 17. The selectivity in assembly of the stan- 100 chionswithin the spaced apertures 17 and 17 facilitates the accommodation ofthe saddle to the variable thickness of sheathing usually encountered.The stanchion 18 embodies a pair of parallel arms 19 having enlargedportions 20 providing abutments 21 which are drawn against the flanges16 by nuts 22 upon the threaded ends of the arms 19. The lower loopedportion of the stanchion 18 is extended inwardly as at 23, upwardly asat 24 and looped laterally as at 25 to form a foot rest adapted toreceive the wei ht of the operator thereon. The arenate portions 23 and24 of the looped foot rest assure the rigidity of the foot rest andamplify the cramping action of the loop 23 against the pilin when thetool is in use. The stanchion mem r 28 likewise embodies parallel arms29 similarly selectively secured within apertures 17 or 17 in theflanges 16. The lower ends of these arms 29 extend inwardly as at 30 andupwardly as at 31 in the plane of the parallel arms 29 and thus form aninverted U-shaped loop 37, the top of which is provided to limit thedownward movement of theanvil block 12.

Inthe application of the device the sheet or ile 14 extends between thestanchions 18 and 28 of the saddle with the anvil block 12 resting uponthe end of the pile and with the spikes 13 extending thereon. The weightof t e operator is thrown upon the foot rest 25 and as the hammerof thedrill strikes the anvil block the sheathing is driven downwardly. Thecrest of the loop 37 retains the anvil block 12 and is formed tosuitably limit its downward movement. When the sheathing to be driven isrelatively narrow the stanchion arm may be secured within the bolt holes17 and as wider sheathin is encountered the saddle may be widene bysecurin the arms of either or both of the sets 0 apertures 17 Referringto Fig. 4, it will be noted that the anvil frame is substantiallyrectangular and that the apertures 17 and 17 are disposed adjacentthe-corners thereof. It will be further noted that the anvil block isformed with tongues 38 which extend between the arms 19 and-29 toprevent rotative movement of the anvil during the operation of the tool.

The'employmem; of bar stock in the constructiouof the stanchions notonly facilitates economic manufacturing practice but provides astructural advantage over baser materials, such as castings, as the useof the rods or bar stock assures a relatively light structure which iscapable of resisting the vibratory strains to which it is subjected.

A further advantage of the design resides in forming the anvil saddle ofseparate stanchions which may be independently adjusted, interchanged orrenewed.

It will be seen, therefore, that the sheathing saddle herein describedis extremely simple in its construction and may be manufactured at avery low cost. It will also be seen that the apparatus is comprised of apair of separate units which may be vinde ndently positioned withrespect to each 0 er. The invention is not to be limited to the exactarrangement of parts or structural detail shown in the accompan 'ngdrawing, or described in this speci cat on, as various changes in thedetail may be resorted to without departing from the spirit of theinvention as herein claimed.

What I claim is:

1. In combination, an anvil frame ada ted to be secured to a sheathingdriver, mem ers of looped rod stock having their ends secured to saidframe, said members providing a plurality of elements extendingsubstantially parallel in a direction substantially that of thedirection of the reciprocation of the anvil, said members-being s acedapart to receive the end of the sheat ing, an anvil carried in saidframe and provided with lateral portions adapted to engage and be guidedby the elements of said members.

2. In combination, an anvil frame ada ted to be secured to a sheathingdriver, mem ers of looped rod stock having their ends secured to saidframe, said members providing a plurality of elements extendingsubstantially parallel in a direction substantially that of thedirection of the reciprocation of the anvil, said members being spacedapart to receive the end of the sheathin an anvil carried in said frameand provi ed with lateral portions adapted to engage and be guided bythe elements of said members, one of said members having a loopedportion extending laterally from the said plane and arranged to providea foot rest for an o erator.

3. In combination, an anvil rame ada ted to be secured to a sheathingdriver, mem rs of looped rod stock having their ends secured to saidframe, said members roviding a plurality of elements extending sustantially parallel in a direction substantially that of the directionof the reciprocation of the anvil, said members being spaced apart toreceive the end of the sheathin an anvil carried in said frame and'provied with lateral portions adapted to engage and be guided by the elementsof said members, said anvil blocks having a laterally extending portionadapted to engage with and be limited in movement by a ooped portion ofat least one of said members.

4. In combination, an anvil frame adapted to be mounted upon a sheathingdriver, laterally extending ears on said frame, members of looped rodstock havin their ends threaded and extending throug apertures in saidears, nuts threaded on the ends of said members and uniting the membersto the frame, said members having elements extending substa-ntially in aplane parallel to the direction of reciprocation of the anvil, saidmembers being spaced apart to resiliently receive the end of thesheathing.

5. In combination, an anvil frame adapted to be mounted upon a sheathingdriver, laterally extending ears on said frame, members of looped rodstock having their ends threaded and extending through apertures in saidears, nuts threaded on the ends of said mem' bers and uniting themembers to the frame, said members having elements extendingsubstantially in a plane parallel to the direction of reciprocation ofthe anvil, said members being spaced apart to resiliently receive theend of the sheathing, an anvil reciproeable in said frame and havinglateral portions adapted to be engaged with and be guided by saidelements. a

6. In combination, an anvil frame adapted to be mounted upon a sheathingdriver, laterally extending ears on said frame, members of looped rodstock having their ends threaded and extending through apertures in saidears, nuts threaded on the ends of said members and uniting the membersto the frame, said members having elements extending substantially in aplane parallel to the direction of reciprocation of the anvil, saidmembers being spaced apart to resiliently receive the end of thesheathing, an anvil reciprocable in said frame and having lateralportions adapted to be engaged with and be guided by said elements, oneof said members having a looped portion extending laterally from thesaid plane and arranged to provide a foot rest for an operator, saidanvil block having a laterally extending portion adapted to engage withand be limited in movement by a looped portion of at least one of saidmembers.

7. The combination with a sheathing driver having a reciprocating anvilblock for engagement with the sheathing and an apertured anvil frame, ofa sheathing guide consisting of a pair of spaced stanchions formed oflooped rod stock and having their free ends projected through saidapertures and adjustably locked to said frame, the looped portions ofthe stanchions extending substantially parallel in the direction ofreciprocation of the anvil and being adapted to receive the end ofsheathing tberebetween.

8. The combination with a sheathing driver having a reciprocating anvilblock for engagement with the sheathing and an apertured anvil frame, ofa sheathing guide consisting of a pair of spaced stanchions formed ofloop rod stock and having their free ends projecting through saidapertures and adjustably locked to said frame, the looped portions ofthe stanchions extending substantially parallel in the direction ofreciprocation of the anvil and being adapted to resiliently receive theend of the sheathing therebetween, one of said loop portions having theextremity thereof projected outwardly at substantially right angles tothe plane of the stanchions to provide a foot rest for

